The webhook url assigned to your Prediction Nodes are automatically registered with your Numerai Models. Numerai will execute those webhooks on Saturday at 19:00 UTC (an hour after the round starts). If we haven't successfully received submissions from your models by Sunday 2:00 UTC, we will email you a warning that it looks like your compute jobs have failed. If any failed, we will try to trigger those webhooks again on Sunday 19:00 UTC and if any fail again, we will send out a final email on Monday 2:00 UTC.